Harshaw TLD Model 4500, Manual reader-Thermo Scientific

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Harshaw 4500 data sheet (82 Kb)

TLD 4500 Spare Parts List (14051 Kb)

Harshaw TLD Model 4500, Manual reader

	The 4500 Manual TLD Reader provides versatile readout of Harshaw TLD dosimeters and is ideal for small or medium capacity applications in radiation protection, medical, research and high dose range dosimetry.

Product Detail

	The Model 4500 connects via a serial interface to an external PC, which provides control over the setup, time-temperature profiles (TTPs), analysis and data recording. A start button and four indicator lights control and monitor the operation. Additional applications packages are available. Performance Highlights Reads 2-, 3-, or 4-element cards and extremity carrier cards using hot gas heating Reads single TLD chips, rods or powders using contact planchet heating Card elements are read in pairs. The pairs of a 4-element card are sequenced automatically Interfaces with WinREMS and software options such as Dose Algorithms, Glow Curve Analyzer and Health Physics Records System Easy to integrate into existing Harshaw TLD systems with minimum additional training System hardware and software expansions can be transparent to the user, and maximize the utility of purchased items All PC functions are external to the reader - Minimum initial reader investment - External PC can be used for other applications - Capacity to improve system performance as PC upgrades become available

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Purchase Details

SKU : Harshaw TLD 4500

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Specifications:

Note: :

Dose-related figures apply to TLD-100 (LiF:Mg,Ti) material

Manual operations :

Load dosimeter, select group file, define setup, define acquisition parameters, enter dosimeter identity, start readout

System operations :

Apply TTP, associate light output with dosimeter identity, store result, index to second element - pair

Processing times :

For chipstrates or 2-element cards, <35 s
For DXT-RAD or 4-element cards, <1 min

Dynamic range :

Seven decades

Linearity :

<1% deviation , above 2x dark current

Test light stability :

<1% short term variation based on 1 standard deviation of 10 consecutive measurements.

High voltage :

<0.005% short term variation

Radiation types and energies :

Photons > 1 keV, neutrons, thermal energy to 100 MeV, betas > 70 keV

Reference light :

Electronic, temperature stabilized, blue LED

Time temperature profiles (TTPs) :

Pre-heat, 0 to 100 s, ambient to 200 °C,
Linear ramp, 1 °C/s to 30 °C/s

Maximum temperatures :

300 °C, Teflon cards
400°C, Kapton cards
600°C Planchet heating
Post-read anneal, 0 to 99 s, up to maximum temperature

Dose range :

10 µGy (1 mrad) to 1 Gy (100 rad) linear
1 Gy (100 rad) to 20 Gy (2000 rad) supralinear

Dose stability :

<1 µGy standard deviation for 10 reads of background

Batch uniformity :

±30% for uncorrected cards
3 month fading: <5% with correction, (<20% without)

Dark current :

<50 µGy, ¹³⁷Cs equivalent dark current

Threshold :

<10 µGy (mrad) 2.26 standard deviations for 10 unexposed dosimeters

Residual signal :

<0.2% of reading without annealing

Repeatability :

<2% variation at 1mGy (100 mrad) ¹³⁷Cs

Reusability :

500 reuses for cards (<10% overall change)
50 reuses for EXT-RAD and DXT-RAD

Operating temperature :

0 to 40 °C

Storage temperature :

-10 to +60 °C

Humidity :

After 24 hr exposure to 95% RH, within specs. after 6-hr recovery

Light intensity :

Withstands 1000 lux with cover fitted

EMC compatibility :

CE-marked, EN-50082-2 & EN-55011 group1 class B
Low Voltage Directive compliant

External connections :

100 - 120 or 220 - 240 V ac ±10%; 50/60 Hz. Regulated gas supply. RS-232 Serial link

Dimensions :

370 H x 460 W x 500 D mm
(14.75" H x 18.25" W x 20.5" D)

Weight :

35 kg (77.5 lb)